C278D BMW Fault Code

Description:

The Camshaft Position sensor will signal the Engine Control Module when the #1 cylinder is ready for the spark plug to fire (top-dead-center on compression stroke).

The ECM uses the information from this sensor to help calculate fuel delivery and spark timing.

C278D Code Symptoms :

When you turn on the ignition, the Service Engine Soon or Check Engine C278D light should flash briefly, indicating that the OBD system is ready to scan your vehicle for any malfunctions. After this brief flash, the light should stay off while you drive as long as no problems are detected. If so, you'll be glad to know that your vehicle is equipped with an early warning system that could save you time, money, and fuel in addition to helping protect the C278D!

Diagnosis And Repairing C278D

C278D OBD 2 code on vehicles with electronically controlled automatic transmissions, the 3-4 shift solenoid is responsible for actuating the hydraulic circuits to activate clutches or bands that change gears inside the automatic transmission.

How to fix C278D code ?

• Exhaust gas leaks
• Faulty Camshaft Position Sensor
• Intake air leaks
• Ignition coils harness is open or shorted

Some systems require that the actuator has an adequate supply of brake fluid. Low brake fluid levels can mimic the symptoms of code C278D, so consult the manual to locate the brake fluid reservoir.

Bear in mind that a low fluid level can set code C278D on some applications, so make sure that on fluid operated systems the fluid level is up to the mark before starting an electrical diagnosis.